While font-stretch is supported by the major browsers, there are not a lot of fonts that variable available.

This p has the style: ultra-condensed

This p has the style: extra-condensed

This p has the style: condensed

This p has the style: semi-condensed

This p has the style: normal

This p has the style: semi-expanded

This p has the style: expanded

This p has the style: extra-expanded

This p has the style: ultra-expanded

This p has the style: fifty

This p has the style: hundred

This p has the style: two-hundred